Gravure alcohol ester plastic in-print environment-friendlyink ink
Technical field
The present invention relates to a kind of environment-friendly ink, particularly a kind of Gravure alcohol ester plastic in-print environment-friendlyink ink.
Background technology
The printing of Present Domestic plastic flexible package, more than 95% is adopt the mode of intaglio printing, and ink industry is being made great efforts to develop the less environment-friendly ink of environmental pollution always and solved toluene class ink and injure the benzene that health produces and the quality problems of benzene remaining influence wrap food.
For food product pack, people, except routine use, it is also proposed requirements at the higher level to its feature of environmental protection, security.For the security of food flexible packing goods, mainly refer to the dissolvent residual in soft packaging, especially benzene remains.Benzene in soft packaging remains, mainly from intaglio printing or dry type compound in manufacture, and the plastic rotogravure printing-ink, composite glue and the solvent that use.The plastic rotogravure printing-ink generally used now, containing a large amount of organic solvents.In printing process, regulate the viscosity of ink with toluene, benzene very easily remains in dry ink look rete, and benzene remains and can pollute food in packaging or articles for use, and is the primary pollution source of intaglio printing environmental pollution.For a long time, the packing bag surface ink printing of composite packaging is main mainly with benzene dissolubility intaglio compound plastic film ink, due to a large amount of toluene release or residual, no matter to environment and production, or all can cause certain potential hazard to HUMAN HEALTH.The solvent used in gravure ink generally has butanone, dimethylbenzene, toluene, butanols etc.Particularly butanone, residual smell is dense.
Current most of ink producer have developed the low ketone of low benzene and without the low ketone compound oil ink of benzene, but can only reach the dissolvent residual reducing benzophenone, thoroughly can not remove the residual of benzophenone.And ink quality does not reach the requirement of print product and relevant quality standard yet.Current domestic integrated compound oil ink Problems existing and analysis reason are summarized as follows:
1. can not reach environmental requirement both at home and abroad, to be specially containing benzene containing ketone, the low ketone of low benzene and without the low ketone compound oil ink of benzene: reason is under the prerequisite not adding benzene, ketone, correct starting material can not be selected to carry out formula compatibility and optimization, and adopt correct production technique, solve the many performances of ink, be embodied in---dissolve bad, drying is bad, and printing adaptability difference-color developing, shallow net shift, resistance to punching property is bad.So must add 5% ~ 10% benzene, ketone to be to reach requirement.
2. anti-yellowing property is poor: traditional ink adopts aromatic urethane, and optical stabilization performance is poor, and after film forming, glued membrane anti-yellowing property is poor.The urethane resin selecting environment-friendly ink special adds benzophenone, and benzophenone solvability is very strong, and the moisture accelerating resin is separated out, and causes ink stability poor, layering after yellowing.
3. attachment fastness is bad, especially the attachment fastness on OPP and BOPP printing element is not up to standard, so the requirement-namely go to print all base materials with a kind of ink of integration can not be reached: reason is the selecting of binder resin, the drying property (solvent evaporates) of the degree of scatter (fineness, viscosity) of ink, ink, add auxiliary agent etc. and all create direct or indirect impact on ink at the attachment fastness of Plastic film surface, the adhesion strength that each factor just can reach excellent must be considered.
4. film forming properties is bad: conventional fragrant race urethane mainly generates hydroxyl-terminated polyurethane resin with polyester polyol/polyether glycol and isocyanate reaction, molecular structure polar groups is based on carbamate, and molcohesion is not enough to meet the requirement of resin for printing ink film forming properties.
5. stifled version, poor, the scraper bad adaptability of shallow net transfer: thinner select and proportion compatibility incorrect, cause ink quick-drying, and the fineness of ink does not have up to standard, particle too slightly, causes scraping unclean.
6. instead to glue: thinner select and proportion compatibility incorrect, do not add correct auxiliary agent, cause ink slow curing.
7. ink deposition: do not add correct dispersion agent, or add filler for reducing costs.
8. a multi-color ink can not be high temperature resistant, do not reach the requirement of integration: not selecting can the pigment of heatproof or high performance resin.
9. easily bubble summer: reason production technique is not controlled well, and do not add correct defoamer.
10. photostabilization and ageing resistance poor.
vocabulary of terms
The urethane resin molecular weight adopted in urethane resin-embodiment of the present invention is 50000, second-order transition temperature <-40 DEG C, and softening temperature: 210 DEG C, originates in Japanese waste river.
The ternary chlorine vinegar molecular resin amount adopted in ternary chlorine vinegar resin-embodiment of the present invention is 36000, and viscosity: 51, TG:99, acid number≤3, originate in Japanese Kao.
Dispersion agent in dispersion agent-embodiment of the present invention adopts Silok766, is a kind of wetting dispersing agent, containing the interpolymer solution of acidic-group.
Defoamer in defoamer-embodiment of the present invention adopts HENSIC-2800, is a kind of organosilyl broken bubble polymkeric substance.
Flow agent in flow agent-embodiment of the present invention adopts Silok8400, is a kind of high temperature resistant flow agent, polyester modification organopolysiloxane, solid content >=99%, oxirane value 0.05-0.12mol/100g., softening temperature: 105 DEG C.
Static inhibitor in static inhibitor-embodiment of the present invention adopts RF-008, it is a kind of nonionogenic tenside, significantly can reduce ink surface tension, its film forming is made to reach 106 ~ 7 Ω, anti-static high efficiency, lasting, good to the wettability of pigment, solvability is strong, can be dissolved in the majority of organic solvents such as alkoxide
Adhesion promoter in adhesion promoter-embodiment of the present invention is purchased from Shanghai Tag Polymer Sciences Ltd..
In thinner-embodiment of the present invention, thinner is made up of Virahol, ethyl ester, n-propyl, butyl ester and diacetone alcohol (DAA), wherein Virahol: ethyl ester: n-propyl: butyl ester: diacetone alcohol (DAA)=3:2:11.3:4:3.5, than being weight ratio.
In the present invention, if no special instructions, various chemical substance is conventional commercial chemical pure level chemical.
Summary of the invention
An object of the present invention is just to provide a kind of Gravure alcohol ester plastic in-print environment-friendlyink ink, and this Gravure alcohol ester plastic in-print environment-friendlyink ink is not thoroughly containing benzophenone, and good product performance.
Technical scheme of the present invention is: a kind of Gravure alcohol ester plastic in-print environment-friendlyink ink, comprises chalk and color ink,
Described chalk comprises: urethane resin 24 ~ 28 parts, ternary chlorine vinegar resin 12 ~ 16 parts, aldehyde ketone resin 2.5 ~ 4.5 parts, 1 ~ 3 part, resol, dispersion agent 0.3 ~ 0.7 part, defoamer 0.3 ~ 0.7 part, flow agent 0.3 ~ 0.7 part, 0.8 ~ 1.2 part, static inhibitor, adhesion promoter 1.5 ~ 2.5 parts, 0.05 ~ 0.15 part, whitening agent, 0.05 ~ 0.15 part, cured powder, titanium dioxide 20 ~ 30 parts and thinner 20 ~ 25 parts; Comprising of described color ink: urethane resin 25 ~ 35 parts, ternary chlorine vinegar resin 13 ~ 17 parts, aldehyde ketone resin 2.5 ~ 3.5 parts, 3 ~ 4 parts, resol, dispersion agent 0.3 ~ 0.7 part, defoamer 0.3 ~ 0.7 part, flow agent 0.3 ~ 0.7 part, 0.8 ~ 1.2 part, static inhibitor, adhesion promoter 1.5 ~ 2.5 parts, pigment 8 ~ 12 parts and thinner 30 ~ 40 parts; Described part refers to weight part.
As preferably, described chalk also includes a acrylic resin, and described color ink also includes acrylic resin.
As preferably, described chalk is: urethane resin 26 parts, ternary chlorine vinegar resin 14 parts, aldehyde ketone resin 3.5 parts, 2 parts, resol, dispersion agent 0.5 part, defoamer 0.5 part, flow agent 0.5 part, 1 part, static inhibitor, adhesion promoter 2 parts, 0.1 part, whitening agent, 0.1 part, cured powder, titanium dioxide 26 parts and thinner 23.8 parts; Described color ink is: urethane resin 30 parts, ternary chlorine vinegar resin 15 parts, aldehyde ketone resin 3 parts, 3.5 parts, resol, dispersion agent 0.5 part, defoamer 0.5 part, flow agent 0.5 part, 1 part, static inhibitor, adhesion promoter 2 parts, pigment 10 parts and thinner 34 parts.
As preferably, described thinner is made up of alcohol and ester.
As preferably, the weight ratio of described alcohol and ester is 1 ︰ 5 ~ 1 ︰ 8.
As preferably, by weight, the thinner in described chalk composition consist of Virahol 3 parts, ethyl ester 2 parts, n-propyl 11.3 parts, butyl ester 4 parts and diacetone alcohol (DAA) 3.5 parts; Thinner in described color ink composition consist of Virahol 5 parts, ethyl ester 4 parts, n-propyl 16 parts, butyl ester 4 parts and diacetone alcohol (DAA) 5 parts.
As preferably, described defoamer is silicone based defoamer.
Another object of the present invention is to provide a kind of method preparing above-mentioned Gravure alcohol ester plastic in-print environment-friendlyink ink.
Technical scheme is: a kind of method preparing above-mentioned Gravure alcohol ester plastic in-print environment-friendlyink ink, comprises the following steps:
1. the preparation of chalk:
1) weigh by formula;
2) dispersed with stirring is carried out after mixing, first low speed dispersion 3-5 minute during dispersion, then high speed dispersion 10-15 minute;
3) grind, Task-size Controlling, at 8um-10um, adopts circulating water cooling during grinding;
2. the preparation of color ink:
1) weigh by formula;
2) dispersed with stirring is carried out after mixing, first low speed dispersion 3-5 minute during dispersion, then high speed dispersion 10-15 minute;
3) grind material, Task-size Controlling, at 5um-6um, adopts circulating water cooling during grinding
As preferably, application number in step 3), is adopted to be that the ink horizontal sand mill of CN201120238526.5 grinds.
In printing ink solvent, the ratio of true solvent and false solvent is one of important factor affecting ink attachment fastness.It is particularly the ink system of main body binder with urethane resin, simple alcoholic solvent is the false solvent of urethane resin as a class non-polar solvent, but its with the coordinating of organic solvent of ester class isopolarity the polarity of mixed solvent system can be made in very large range adjustable thus the polarity adapting to urethane resin itself, and reach best solvency power.Molecular resin microcosmic in such solvent system is extended position, be conducive to the dispersion in pigment grinding process with soak and form homogeneous package status.But, alcoholic solvent additional proportion is lacked of proper care, not only make polyurethane resin systems bad stability, the existence of too much false solvent, makes microcosmic molecular resin become the state of curling, and even multiple molecular resin is wound around and is wrapped up by false solvent together sometimes, in dispersion process can not well and pigment particles formed well wetting, have impact on the homogeneity of ink in stock surface set film forming, sticking power declines naturally, so the ratio of alcohols and esters solvent wants correct.
The present invention compared with prior art tool has the following advantages:
1, environmental protection ink of the present invention is not containing benzene, ketone, environmental protection, and color inhibition, strong adhesion, film forming properties are excellent, shallow net shifts, and scraper adaptability is good, do not precipitate, non-foaming.
2, thinner adopts alcohol and ester, does not add and adds benzene, ketone, meet the requirement of environmental protection and user demand.
3, suitably add Chlorinated Polypropylene III class adhesion promoter and the sticking power of resol solution to OPP and BOPP, increase attachment fastness.
4, adopt alcohols and ester class as solvent, the polarity of mixed solvent system can be made in very large range adjustable, thus adapt to the polarity of urethane resin itself, and reach best solvency power.Molecular resin microcosmic in such solvent system is extended position, be conducive to the dispersion in pigment grinding process with soak and form homogeneous package status.
5, in thinner, high boiling slow drying solvent DAA3% ~ 5%(proterties is added: colourless liquid.There is agreeable odor.Can with water, ethanol and other immiscible organic solvents).Carrying out correct compatibility makes drying property up to standard, namely just dry and thoroughly dryly reach specialized range, avoids quick-drying.
6, anti-gluing is avoided: 1. add a certain amount of cured powder, the wax powder used in polyurethane ink is produced is often low molecular weight polyethylene wax, relative molecular mass is generally 1000 ~ 6000, to organic solvent in ink, there is good solvability, and better with the affinity of urethane resin own, there is good chemical stability simultaneously.Mainly play the rub increasing ink film surface, suitably can alleviate the resistance to anti-stickiness of ink itself simultaneously.2. selecting correct thinner to carry out correct compatibility makes drying property up to standard, namely just dry and thoroughly dryly reach specialized range, avoids slow curing.3. high molecular polymerization resin is added---ternary chlorine vinegar strengthens ink hardness, avoids anti-sticky.
7, prevent ink deposition: add dispersion agent, be mainly used in wets out pigments surface, shorten ink manufacturing time, be conducive to the dispersion of pigment, sometimes also suitably can reduce the oil number of pigment.When manufacturing high density ink, the yield value of ink can be reduced, prevent granules of pigments generation aggegation and precipitation in ink to have certain effectiveness.
8, silicone based defoamer is adopted to solve bubble problem in summer.
9, after acrylic resin adds and other composition of ink form synergistic effect, make ink have good photostabilization and anti-outdoor aging and other premium properties.
Embodiment
The preparation of embodiment 1 chalk A1 and color ink B1
Take urethane resin 24g respectively, ternary chlorine vinegar resin 12g, aldehyde ketone resin 2.5g, resol 1g, dispersion agent 0.3g, defoamer 0.3g, flow agent 0.3g, static inhibitor 0.8g, adhesion promoter 1.5g, whitening agent 0.05g, cured powder 0.05g, titanium dioxide 20g, thinner 20g input charging basket carry out mix and blend dispersion.Stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute, then high speed dispersion 10-15 minute.It is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 5um-6um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Chalk A1 is obtained after grinding.
Take urethane resin 25g respectively, ternary chlorine vinegar resin 13g, aldehyde ketone resin 2.5g, resol 3g, dispersion agent 0.3g, defoamer 0.3g, flow agent 0.3g, static inhibitor 0.8g, adhesion promoter 1.5g, pigment 8g, thinner 30g input charging basket carry out mix and blend dispersion, stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute during stirring, high speed dispersion 10-15 minute again, it is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 8um-10um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, therefore adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Color ink B1 is obtained after grinding.
A4, B4 performance is as table one.
Respectively chalk A1 and color ink B1 loading chalk box and color ink box are printed simultaneously when printing in intaglio plate.
The preparation of embodiment 2 chalk A2 and color ink B2
Take urethane resin 26g respectively, ternary chlorine vinegar resin 14g, aldehyde ketone resin 3.5g, resol 2g, dispersion agent 0.5g, defoamer 0.5g, flow agent 0.5g, static inhibitor 1g, adhesion promoter 2g, whitening agent 0.1g, cured powder 0.1g, titanium dioxide 26g, thinner 23.8g input charging basket carry out mix and blend dispersion.Stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute, then high speed dispersion 10-15 minute.
Grind material after mixture stirs, after grinding, the granularity of material is 5um-6um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Chalk A2 is obtained after grinding.
Take urethane resin 30g respectively, ternary chlorine vinegar resin 15g, aldehyde ketone resin 3g, resol 3.5g, dispersion agent 0.5g, defoamer 0.5g, flow agent 0.5g, static inhibitor 1g, adhesion promoter 2g, pigment 10g, thinner 34g input charging basket carry out mix and blend dispersion, stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute during stirring, high speed dispersion 10-15 minute again, it is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 8um-10um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, therefore adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Color ink B2 is obtained after grinding.
A2, B2 performance is as table one.
Respectively chalk A1 and color ink B1 loading chalk box and color ink box are printed simultaneously when printing in intaglio plate.
The preparation of embodiment 3 chalk A3 and color ink B3
Take urethane resin 28g respectively, ternary chlorine vinegar resin 16g, aldehyde ketone resin 4.5g, resol 3g, dispersion agent 0.7g, defoamer 0.7g, flow agent 0.7g, static inhibitor 1.2g, adhesion promoter 2.5g, whitening agent 0.15g, cured powder 0.15g, titanium dioxide 30g, thinner 25g input charging basket carry out mix and blend dispersion.Stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute, then high speed dispersion 10-15 minute.It is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 5um-6um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Chalk A3 is obtained after grinding.
Take urethane resin 35g respectively, ternary chlorine vinegar resin 17g, aldehyde ketone resin 3.5g, resol 4g, dispersion agent 0.7g, defoamer 0.7g, flow agent 0.7g, static inhibitor 1.2g, adhesion promoter 2.5g, pigment 12g, thinner 40g input charging basket carry out mix and blend dispersion, stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute during stirring, high speed dispersion 10-15 minute again, it is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 8um-10um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, therefore adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Color ink B3 is obtained after grinding.
A3, B3 performance is as table one.
Respectively chalk A1 and color ink B1 loading chalk box and color ink box are printed simultaneously when printing in intaglio plate.
The preparation of embodiment 4 chalk A4 and color ink B4
Take urethane resin 26g respectively, ternary chlorine vinegar resin 14g, aldehyde ketone resin 3.5g, resol 2g, acrylic resin 1g, dispersion agent 0.5g, defoamer 0.5g, flow agent 0.5g, static inhibitor 1g, adhesion promoter 2g, whitening agent 0.1g, cured powder 0.1g, titanium dioxide 26g, thinner 23.8g input charging basket carry out mix and blend dispersion.Stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute, then high speed dispersion 10-15 minute.It is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 5um-6um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Chalk A4 is obtained after grinding.
Take urethane resin 30g respectively, ternary chlorine vinegar resin 15g, aldehyde ketone resin 3g, resol 3.5g, acrylic resin 1g, dispersion agent 0.5g, defoamer 0.5g, flow agent 0.5g, static inhibitor 1g, adhesion promoter 2g, pigment 10g, thinner 34g input charging basket carry out mix and blend dispersion, stirrer adopts FS series of high speed dispersion machine, first low speed dispersion 3-5 minute during stirring, high speed dispersion 10-15 minute again, it is more even that first low speed can make material dispersion obtain at a high speed again.Stirrer will clean very clean, answers attentional manipulation viscosity, fineness, tinting strength, sticking power etc. during stirring.
Grind material after mixture stirs, after grinding, the granularity of material is 8um-10um; Because temperature is higher during grinding, need to adopt recirculated water to lower the temperature, therefore adopt application number to be the ink horizontal sand mill of CN201120238526.5 during grinding, by the water coolant in grinding vessel, temperature is reduced, prolonged mechanical work-ing life.
Color ink B4 is obtained after grinding.
A4, B4 performance is as table one.
Respectively chalk A1 and color ink B1 loading chalk box and color ink box are printed simultaneously when printing in intaglio plate.
Table one
Upper table one general ink wherein refers to commercially available containing benzophenone intaglio plate plastic inner printing ink.